German Alternative forms Grossmaul (Switzerland, Liechtenstein) Etymology From groß + Maul. Pronunciation IPA(key): /ˈɡʁoːsˌmaʊ̯l/ Audio:(file) Hyphenation: Groß‧maul Noun Großmaul n (strong, genitive Großmaules or Großmauls, plural Großmäuler) big mouth, loudmouth Synonym: Maulheld Further reading “Großmaul” in Duden online “Großmaul” in Digitales Wörterbuch der deutschen SpracheWikiwand - on Seamless Wikipedia browsing. On steroids.